DE587007C - Device for the aluminothermic welding of the joints of railway operating tracks without disturbing the traffic - Google Patents

Description

Biblioflieek
, Ind. Own
ISNOV. 1933

GERMAN EMPIRE

ISSUED "
OCTOBER 28, 1933

- ■ - RE-ICHSPATENTAMT

PATENT LETTERING

CLASS 49 h GROUP 35 oi

w90471 H49h

John Wattmann in Berlin-Lankwitz

without disrupting traffic

Patented in the German Empire on November 29, 1932

At aluminothermi, we see rail welds in busy railway tracks it is desirable to have what is necessary for a weld. Time during which the operation must rest to shorten as much as possible. It is therefore important that the preparations which are required for the execution of the weld casting, 'as far as possible To be taken in such a way that the operation does not have to be interrupted. These preparations also include • placing the casting mold and preheating of the stream.

According to the working method that has been used up to now, the form was placed before the the space around the rail ends on all sides, especially under the rail foot cleared, and then set the mold in such a way that it, from the rails themselves carried, floating freely in the air. This procedure would require the Traffic already interrupted as soon as the space around the rail to attach the Eorm is made free because from this point on the rail ends are without any support can move freely downwards or to the side or against each other, that is resemble an unlinked, floating collision.

It is already known that this interrupts traffic when welding to avoid the rail ends being cranked around the molding boxes by yoke-shaped ones Lugs connects and the joint to be welded is bridged by a ramp attached to the lugs on both sides. However, this procedure is very cumbersome, requires a lot of space and is only very strong It is possible to reduce the speed of travel on tram tracks, but not on railroad tracks.

The invention is intended to provide the possibility - "to carry out the operation even after applying and sealing the mold so far that the wheel can still drive over the joint, be created by such a configuration of the mold; that the rails be supported by the form on a transverse sleeper arranged under the joint. According to the invention, there is one known per se, made up of side parts and a bottom part existing casting mold application, namely ■ according to the invention, the bottom part is so strong that it supports the rail ends to be welded against the cross sleeper and can also carry while driving on the track. For this purpose, the side walls of the molding box in whole or in part

be wise so strong that the wheel loads acting on the rails are transferred to the Can transfer threshold. The cavity of the .Form-S kasten can naturally not absorb any pressure forces that may be considered and is therefore not suitable for supporting the rails.

However, there is the clear width of the molding box

"O is only about 12 to 15 cm, that is, each rail end floats freely over a length of only 6 to 7 ^{1 and} ₂ cm, any considerable bending moments can occur at the rail ends with such a configuration

> 5 of the molding box do not enter. How nice mentioned, the form can naturally only be applied to this extent without interrupting operations as the parts of which do not protrude into the roadway of the wheel. So it is necessary to divide the shape into an upper and a lower part, the latter of which can be attached and sealed separately from the upper part. Now that the seal of the lower part of the mold is the most difficult Rigsten is and takes up most of the time, so can by the device according to the invention a not insignificant time saving can be achieved all the more than in the one set Molded part even before the interruption of operation, the rails in considerable Dimensions can be preheated. To a firm concern of the molding box on the one hand on the rails, on the other hand, on the threshold, it is advisable to zwisehen To arrange threshold and molding box a wedge-shaped intermediate layer, through whose driving a firm resting of the molding

■ part of the box bottom can be brought about on the threshold. It's all the easier as the sleepers are horizontal, but the rail is usually a little inclined to the sleeper, and thereby given the inclination of the wedge

• is.

This also means that the rail ends are offset against each other in the horizontal direction is prevented is the use of a side part and a bottom part existing molding box lower part expedient, with the under the rail foot to the sliding bottom part is to be equipped with side edges protruding upwards, that thereby the feet of the two abutting rails -a guide in the direction the rail axis.

Multipart forms such as those used in the invention so far only used if the rail

■ encounter double sleepers in the track that has already been laid lie. The only purpose of this was to avoid removing the sleepers, which prevent the attachment of ordinary forms consisting only of side parts are.

In Figs. 1 to 3 an embodiment of the invention is shown, namely Fig. Ι a cross section along line II through the joint center and the molding box, Fig. 2 is a cross section through the threshold and the molding box according to line H-II and Fig 3 the top view of the bottom part of the molding box with missing rails. Everywhere A are the rails, B the cross-sleeper, C ₁ D and D ¹ the parts of the molding box lower part, where C represents the bottom part on which the rails A rest in the grooves B. F are those forming these grooves. Side edges of the bottom part C ₁ which lead the feet of the two abutting rails between them. The bottom part C is provided with a cavity G for receiving the molding sand. H is a wedge-shaped plate which is driven between the form C and the sleeper B in order to bring about a firm support of the rails on the sleeper when the rails are laid at an incline. '

The facility is used as follows:

When changing rails on tracks with heavy traffic, the time available does not generally allow the joints to be welded when the rails are laid. These are therefore to be lashed as a makeshift, whereby they are to be arranged from the outset floating between two shock sleepers. When the track is being laid, the emergency threshold B 'is to be laid between the two joints on a previously well-leveled and tamped track body made of gravel. If necessary, it is advisable to support the lashed joint on the sleeper with intermediate layers. The track can now remain in operation for a longer period of time until there is an opportunity to weld the joints. If this is to take place, the lashing must be removed during a break in operation and the casting mold, as described above, set up and braced against the sleepers by wedging. The casting mold has to be sealed and, if necessary, the joint can now be preheated before the last pull passes the weld. If the latter has happened, the upper part of the mold is also put on, the preheating is continued if necessary and the aluminothermic welding process is carried out. After a while of cooling, the mold is removed and the still red-hot head is smoothed by forging, whereupon after a further cooling-down period, operation can pass the joint. If necessary, as long as the splint is still warm and its strength

is thereby still reduced, a renewed support of the joint against the Threshold.

Claims (2)

Patent claims: t. Device for the aluminothermic welding of the joints of railway tracks without disturbing the traffic, characterized by the use of a mold consisting of side parts (D, D ¹ ) and a bottom part (C), the bottom part of which is so strong that it encounters the rail ends (A) to be welded is supported against a cross sleeper (B) located under the joint and can also be carried while driving on the track. 2. Apparatus according to claim 1 for rails laid at an incline, characterized in that a wedge (H) is driven between the bottom part (C) and cross sleeper (B). 1 sheet of drawings